Polyhalite and Obsidian Physical Properties

Polyhalite and Obsidian Chemical Formula

While comparing Polyhalite and Obsidian physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Polyhalite and Obsidian chemical formula.

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Polyhalite and Obsidian Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Obsidian Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Obsidian Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 2.35-2.60 whereas that of Obsidian is 2.35-2.60.